A method is provided for demodulating a signal. A relay node receives control information, from an evolved-NodeB (eNB), through a relay-physical downlink control channel (R-PDCCH), and receives a data, from the eNB, through a physical downlink shared channel (PDSCH). When a number of transmission layers of the PDSCH is 2 or more than 2 and a plurality of reference signals for a demodulation of the data are transmitted on antenna ports by the eNB, a reference signal transmitted on a minimum antenna port among the antenna ports is used for a demodulation of the control information.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A method for demodulating a signal, performed by a relay node, the method comprising: receiving control information, from an evolved-NodeB (eNB), through a relay-physical downlink control channel (R-PDCCH); and receiving a data, from the eNB, through a physical downlink shared channel (PDSCH), wherein when a number of transmission layers of the PDSCH is 2 or more than 2 and a plurality of reference signals for a demodulation of the data are transmitted on antenna ports by the eNB, a reference signal transmitted on an antenna port having a lowest antenna port number among the antenna ports is used for a demodulation of the control information.
2. The method of claim 1 , wherein a number of the plurality of reference signals used for a demodulation of the data is same as a number of transmission layers of the PDSCH.
3. The method of claim 1 , wherein a number of transmission layers of the R-PDCCH is 1.
4. The method of claim 1 , wherein the control information and the data are received at different times in a same subframe.
5. A Relay Node (RN), comprising: a radio frequency (RF) unit configured to transmit and receive a radio signal; and a processor connected to the RF unit, wherein the processor is configured to control the RF unit to receive control information, from an evolved-NodeB (eNB), through a relay-physical downlink control channel (R-PDCCH) and receives a data, from the eNB, through a physical downlink shared channel (PDSCH), and wherein when a number of transmission layers of the PDSCH is 2 or more than 2 and a plurality of reference signals for a demodulation of the data are transmitted on antenna ports by the eNB, a reference signal transmitted on an antenna port having a lowest antenna port number among the antenna ports is used for a demodulation of the control information.
6. The RN of claim 5 , wherein a number of the plurality of reference signals used for a demodulation of the data is same as a number of transmission layers of the PDSCH.
7. The RN of claim 5 , wherein a number of transmission layers of the R-PDCCH is 1.
8. The RN of claim 5 , wherein the control information and the data are received at different times in a same subframe.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
September 6, 2016
June 26, 2018
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